Locomotive-boiler furnace.



LE GRAND PARISH.

LOCOMOTIVE BOILER FURNACE.

APPLIQATION mm OCR/1.1913.

Patented May 4, 1915.

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LE GRAND mush.

LOCOMOTIVE BOILER FURNACE.

APPUCATION FILED OCT. 1, 1913.

Patented May 4, 1915.

2 SNEET$-SHEET 2.

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nurrsn sra'rss PATENT @FFICE.

LE GRAND PARLEH, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO AMERICAN ARCH COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

LOGOMOTlVE-BOILER FURNACE.

Specification of Letters Patent.

Patented May 4, 1915 To all whom it may concern I 7 Be it known that 1, LE GRANp PAnIsH, a citizen of the United States, and a resident of New York city, county of New York, and State of New York, have invented certain new and useful Improvements in Locomotive-Boiler Furnaces, of which the following is a specification. I

My invention relates to improvements in locomotive boiler furnaces and has particul ar reference to improvements in refractory baflles or defiecting walls for the fire boxes of locomotives.

The object of my invention is to provide a refractory arch or bafile in a locomotive fire box which shall prevent the direct flow of the gases from the fuel bed to the fiues, which shall effectually intermingle and intermix the rising fire box gases and which shall increase the economical and efficient operation of the fire box as a steam pr0- ducer.

A further object of my invention is to provide an arch of novel construction which shall turn the gases out of their direct path from the fuel bed to the flucs and cause them to flow rearwardly through the fire box in provide a refrhctory ballle or arch in a loco motive fire box which shall be composed of a. plurality of refractory flat slab like bricks which are supported in such related positions that an arch is provided which .shall so direct and control the movements of the fire box gases that most economical and benefi- Jial results shall result.

My invention resides in a locomotive firebox-provided with a refractory arch having the functions above mentioned. My invention also resides in a locomotive firebox provided with an arch composed 0" a plurality of flat slab refractory bricks-and means for supporting the bricks to form an arch having the described functions.

My invention further consists in the combination with a locomotive fire box of a transverse refractory arch therein having outwardly and upwardly inclined side portions and a central portion which is V-. shaped at the rear end and coincides with v the inclination of the side portions and which is transversely/fiat at the forward end and Which gradually varies'from end to end from the one extreme to the other.

longitudinally extending panels supported at their meeting edges on longitudinally arranged tubes, the outer panels being arranged at a constant transverse inclination from end to end and the middle panels changing their inclination from end to end between an inclination coincident with that of the side panels at the rear end to a horizontal position or substantially no inclination in their forward ends.

My invention also consists in the several combinations and arrangements of parts and in the features of construction Whereby'the above and other objects are attained, and all as hereinafter described and pointed outin the appended claims.

' My invention will be more readily understood by reference to the accompanying drawings in which;

Figure 1 is a central vertical longitudinal section of a fire box equipped with a refractory arch in accordance with my invention; Figs. 2, 3, 4, 5, 6 and 7 are detailed transverse sections of the arch taken on the lines 2-2, 3-3, 4'4, 55, 6 -6, and 77, respectively, of Fig. 1; and Fig. 8 is a vertical transverse section of the fire box showing a rear end elevation of the arch, and incidentally disclosing the preferred form of the side sheet engaging ends of the bricks.

It should be understood that While I have limited the illustration of my invention to a so-called front arch my invention may be applied to the construction of arches in other positions in the fire box and having varying-functions without departing from the spirit thereof. The principal function of the so-oalled front arch is to preventthe direct flow of the gases of combustion from the fuel bed to the fines and thereby cause ii gases to flow backward and forward in :he fire box, being thus detained in the fire W andbeing mixed or intermingled by the 1 and caused to impinge upon the side cts of the fire box. My invention is particularly directed to viii Lancing the desirable qualities of such arches resulting bathe more thorough intermingling-and=intermixing of the gases causing them to be positively impinged agamst the inner walls of the fire box and thereby causing them to give up their heat'thereto and thus enhance the economical and efiieient operation of the fire box.

A locomotive fire box A, as illustrated in the drawings, consists of a forward or flue sheet a, a rear sheet of, side sheets a and a' crown sheet at: Flues a lead forwardly from the flue sheet throu h the boiler, and the rear sheet is provide lower end of the box. I prefer to buildup my arch out of a plurality of refractory members or bricks and for the purpose of supporting these members in position I procenter and sides of the fire-box, onent each side, and I arrange the third. tube 1)? in such a manner that when the arch is supported upon the tubes, the sha of the arch or its cross section will gra ually change from end to end In the form of my invention illustrated the forward ends of the three tubes are arranged in substantially a single transverse line and the part .of the center tube which supports the rear end of the arch is arranged out of line with and below the similar portions of the side tubes. On these tubes I build an arch C composed of a plurality of transverse rows D, of fire bricks E, e'ach transverse row D comprising a central portion formed of two bricks d which extend between and are supported by the three tubes, and side portions, each com-' posed of a single brick a? supported at its inner end upon one of the side tubes and which leans agalnst the adjacent side sheet in an upwardly and outwardly inclined position. Each of the bricks d is provided in its inner end with a tube receiving socket or .oove d and at its outer end with a lower inclined surface (1 adapted to rest upon the .side tube.

Figs. 2 to 7 clearly illustrate the gradual with a fuel door or opening a. A grate-a is provided in the clear that the arch is conformed in its transverse-sectional shape to the relative positions of the three supporting tubes. The formation of the center bricks (1 permits them; to adjust themselves to the relative positions of the center tube and side tubes and rest securely thereon. A particularly valuable feature of my improved arch resides in the fact that as the gases of combustion rise from the fuel bed into contact with the lower surface of the arch and flow upwardly therebeneath, the rising gases are forced to roll outwardly into direct impinging contact with the sidesheets of the fire box and this change in direction of the gases is gradually effected throughout the length of the arch by reason of the. gradual change of shape thereof and whereby the gases are not only thoroughly intermingled and intermixed but are forced into contact with the side sheets of the fire box. The gases are thus caused to impinge against and flow in over and in contact with the side sheets of the fire box and thereby deliver the heat of gombustion efficiently to the walls of the fire Preferably I arrange the tubes and the sizes of the bricks so that the bricks of which the arch is built will not be so large but that they ma be readily passed through I the fine door an will not be too heavy but thatthey may be readily placed in position upon the tubes. I provide the undersurfaces I of the arch bricks with shallow gas mixing recesses or pockets (1 which serve to provide the arch with many small deflecting surfaces arranged at diflerent angles. Thesepockets and deflecting surfaces enhance the gas mixin qualities of the arch.

11 building my arch I first arrange the arch supporting tubes in the fire box as de scribed, the side tubes being upwardly .and' rearwardly inclined at greater angles than the center tube. I then place a'transverse row D of bricks upon the lower end of the tubes and in contact with the side sheets, this first row being substantially against or in contact with the flue sheet. I .then place a second row D on the tubes above the first row in contact therewith and supported: thereby. The center bricks of the first row are s1 stantially horizontal, and the center bricks of the second row are inclined at a slight angle transversely of the fire box, each being inclined upwardly and outwardly from the center tube. In some instances where'lthe arch is installed in small fire boxes these two transverse rows of fire bricks provide an arch of sufficient length to accomplish the desired results but usually it requires several transverse rows of the bricks .and itis usually desirable to extend the arch rearwardly' to. substantially the middle of iio the fire box as shown, The middle bricks of each succeeding row, rearwurtlly from the row which is in contact with the line sheet, are inclined transversely at greater angles until upon reaching the rear transverse row the middle bricks are inclined at substant ally the same angles as the side bricks, cleafny ubriup in Fig. T.- This gradual change in relative position of the center bricks of rows from a transverse horizontal position at the forward end to the maximum inclination at the rear end serves to gradually change the course of the rising fire box gases from a rearward flow beneath the arch to an outward flow to and against the side sheets of the fire box and this change in direction causes the gases to roll over and over and thereby be mixed and impinged against the side sheets of the tire hon 'ihe weight of the arch holds the several rows pressed forwardly into contact with each other and against the line sheet on the ire clined tubes and serves to retain the arch in position. The rising lire box gases in striking the gradiuilly changing surface of the arch are divided and forced utwardly in both directions, and having been thus divided and forced outwardly as they rise up wardly beneath the arch, are caused to be further mixed and intermingled as they turn to flow forwardly through the tire box be; tween the upper inclined surfaces of the arch and crown sheet, with the result that the gases of combusti n are not only held in the fire box longer than they would he were no arch used but they areso thoroughly mixed and intermingled that the oxygen present is brought into intimate contactwith the highly heated fuel and thereby substantial complete combustion attained in fact the whirling which imparted to the two separate bodies of gases which flow upward in contact with the side sheets, one at one side and one at the other side of the arch, forcibly causes these bodies of gas to thoroughly intcrmingle with each other as they are crowded together to pass through the triangular shaped opening or passage provided between the arch and the crown sheet.

As many Inmlilications of my invcnti 'ui will readily suggest thcn'iselves to one skilled in the art I do not limit or confine my invention to the specific structures shown and described I claim:

1. A locomotive boiler tire box in combination with a refractory front arch therein extending from side sheet to side sheet. said arch being substantially Vshapcd in cross section i. c. the sides thcrcol' being upwardly and outwardly inclined at its rear cod and gradually varying in shape from end to end.

2. A locomotive boiler tire box in combination with a refractory front arch therein,

herein extending from side sheet to side sheet, the forward end of the arch being substantially horizontal in its center portion and the rear end thereof being V-sliaped Z. c. the sides thereof being upwardly and outwardly iiiclincd, and the arch varying gradually in shape from end to end 3., A locomotive boiler fire box in combination with a refractory front arch therein comprising at its forward end a central section which is horizontal and upwardly and outwardly inclined end sections, and at its rear end side sections similarly inclined and a center section which has sides inclined co incident with theside sections, the intermediate central portion of the arch varying gradually in inclination from one end to the other.

In a locomotive firebox a transverse arch comprising a plurality of longitudinally arranged panels: or sections, the side panels being symmetrically arranged and inclined upwardly and outwardly at a uniform angle from end to end, the center sections being also symmetrically arranged and varying in ir. 'lination from end to end the forward ends thereof being horizontal and the rear ends inclining upwardly and outwardly substantiall coincident with the sides substantially as described.

.3. A locomotive boiler lire box in combination with a longitudinally inclined refractory front arch t: cin, extending from side sheet to side sheet. having upwardly and mitwardly inclined side portions extendinn from front to rear and arranged at snbstan tiall y a constant angle to the side sheets and a. middle portion which is V-shaped and the sides of which vary in inclination transversely to the arch from end to end thereof;

the rear ends thereof being substantially in the planes of the sides.

(3. A locomotive boiler lire box in combination with a longitudinally inclined refractory front arch therein extending from side sheet to side sheet having "side portions extending upwardly and outwardly at a constant angle from end to end and having a middle portion which is V-shaped and whose sides are upwardly and outwardly inclined at a greater angle at the rear ind thereof than at the forward end thereof and the inlermediatc portion of which \arics in transverse inclination from end to end.

7. A locomotive boiler fire box in combina tion with a plurality of arch supportinn tul cs arranged longitudinally therein and inclined upwardly and rearwardl from the line short, the members of said group being transversely synnnetrically positioned, the side portions thereof occupying a common transverse plane and the middle portion varying therefrom, a refractory arch coinposcd of a plurality of longitudinal sections supported by said tubes and the side sheets of the fire box, the undersurface of the arch my hand, this 19th day of Sept, 1913, in the being subsgantially VI-shapled e. beillilg uppresence of two subscribing witnesses. wardly an outward y inc ine and t e angle subtended by the sides gradually de- Lb GRAND PARISH" 5 creasing from the forward to the rear end \Vitnesses:

of the arch. JOHN P. NEFF,

In testimony whereof I have hereunto set J 0s. T. ANTHONY. 

